Model: K21B
Airframe Ball Bearing1.3130 inches bore diameter, 2.0625 inches overall outside diameter, grease lubrication material, 0.3750 inches outer ring width.
Special Features:
W80 pct.Full of mil-g-81322, heat treat rings and balls to rockwell c 60 to 66 and stabilized for operation at 250 deg. F, radial and lateral eccentricity, inner ring 0.0010 in. Outer ring 0.0016 in., 0.0003-0.0010 in. Radial clearance
Properties:
A cylindrical item in which the inner or outer ring turns upon row(s) of hardened ball, bearing which roll on a raceway, thus minimizing friction. These items are characterized by their noncorrosive qualities, lightness of weight, inch dimensions rather than metric, inner rings generally projecting beyond the faces of the outer ring, or a very narrow width inner ring having an outside diameter slightly larger than the bore diameter. Designed primarily for use in aircraft assemblies, such as control systems and surfaces of aircraft. Excludes bearing, ball, annular.
Part K21B NSN 3110-00-042-0444
Material Classification
Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicatorsPackaging & Shipping
Freight Classification
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Schedule B and Export
- Schedule B: 8482105068
- SITC: 74610
- End Use: Industrial machines, other
- NAICS: 332991
- USDA: 1
Freight Class: Ball bearings, nesoi
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